Honestly could see him being a min guy to round out the wing rotation next season. That may seem surprising, but he's a pretty versatile player who seems like he could adapt really well to a bench role where he could defend and just sort of blend into the offense. If the Spurs use their cap space on big men (like signing Howard or Sullinger with cap space and keeping West or Boban with the room exception), then Barnes seems like a good choice to replace Manu.